/*******************************************************************************
 * Copyright 2011 Alexandre Zglav and Morphiastic
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package com.morphiastic.analysis.filters;

import java.io.IOException;
import java.util.Map;

import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;

import com.morphiastic.analysis.AnalysisComponentDefinition;
import com.morphiastic.utils.EqualsUtil;
public class TruncateTokenFilter extends ElasticFilter{

	
	public static final String LENGTH_PARAM_KEY = "length";
	
	private Integer length;
	

	public TruncateTokenFilter(String defName){
		this(null,defName);
	}
	
	
	public TruncateTokenFilter(Map<String,String> params, String defName){
		super(ElasticFilterType.truncate, defName);
		if(params!=null){
			String lenStr = params.get(LENGTH_PARAM_KEY);
			if(lenStr!= null && !lenStr.isEmpty()){
				try {	
					Integer len = Integer.parseInt(lenStr);
					this.length = len;
				} catch (NumberFormatException e) {
				}
			}
		}
	}
	
	
	@Override
	public boolean hasCustomParams() {
		 if(this.length!= null)return true;
		 return false;
	}
	

	@Override
	public XContentBuilder addToBuilder(XContentBuilder mappingBuilder) throws IOException {
		mappingBuilder.startObject(getDefinitionName())
		.field("type", getComponentSubTypeName());
		if(this.length != null){
			mappingBuilder.field(LENGTH_PARAM_KEY, this.length.intValue());
		}
		return mappingBuilder;
	}
	


	@Override
	public void setParamsFromSettings(Settings settings) {
		String lenStr = settings.get(LENGTH_PARAM_KEY);
		if(lenStr!= null && !lenStr.isEmpty()){
			try {	
				Integer len = Integer.parseInt(lenStr);
				this.length = len;
			} catch (NumberFormatException e) {
			}
		}
	}
	
	
	
	

	@Override
	public boolean areEquivalentDefinitions(AnalysisComponentDefinition other){
		
		if(other==null)return false;
		TruncateTokenFilter o;
		try {
			o = (TruncateTokenFilter)other;
		} catch (ClassCastException e) {
			return false;
		}
		
		return 
		EqualsUtil.areEqual(this.length, o.length);
	}
	
	
}
